I was told i'm anemic plus had low potassium, could this be the cause of my fast/irregular heart beat/rate?

Irregular pulse: A simple answer to your question is "yes". You need to go to the physician (p) who ordered the blood test on you that found you to have a low potassium (k) as well as being anemic. A 36 year old person is not expected to have anemia nor a low k level being on no medications. You may have to serious problems, anemia and low k. See a p for a diagnosis and a treatment plan of your two problems.